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Can someone help me understand the NCRS point scoring system. It seems that you start out with ~4500 points, you go down from there based on a deduction scale. You have (5) categories that they score from. Does this mean they are evenly judged at 20% ea? There appear to be sub categories under each main category. I.e. originality & condition. How does someone determine the weighting of each of these sub categories under each main category? I have the Judging standards book, but they don't really go into the details of how the overall score it boiled up into the overall score, then divided by 45 to get a percentage.
There are scoring sheets for each year that are available from Roy Sinor the National Judging Chairman. You may need to be an NCRS member but if you email Roy he will send them to you.
They show in detail what components under each of the sections are assigned what points for both originality and condition.
You probably have the "Technical Information Manual & Judging Guide" for your year car; the "Corvette Judging Reference Manual", commonly known as the "White Book", explains the judging/scoring system in detail, along with the "standard deduction" tables for major components - it's also available from the on-line store at www.ncrs.org. Each year car has its own set of judging/scoring sheets (as Dave mentioned above, available to members in .pdf format from Roy Sinor), tailored to that particular car, with the originality and condition points allocated to each item on the car for the five judged areas (Operations, Interior, Exterior, Mechanical, and Chassis).
These three references are the basics to understand how the judging/scoring system works, and will also allow you to "self-judge" your car against the standard to get an idea of where improvements can gain you the most points.